Hi Katrin,
what do you mean with other payments? Or what is it in your concrete issue?
The error message says "payment advices of advice collection"...is it right, that you have more as one advice to allocate?
I think the concrete case is more transparent to the community if you would give us more details of the allocation: How many advices from how many different customers/suppliers? Which other payments? etc
Best Regards,
Andreas